<?php	
$db_host = "localhost";	
$db_user = "username";			
$db_user_pw = "password";		
$db_defdb = "dbname";			

$conn = mysql_connect($db_host,$db_user,$db_user_pw) or die ("Could not connect");
mysql_select_db($db_defdb,$conn) or die ("Could not select DB");

unset($db_host,$db_user,$db_user_pw,$db_defdb);
?>